Introducing Heroku XL

Performance: Fast & Consistent

Apps at scale require fast and consistent response times. In order to
achieve this, Performance dynos
are highly isolated from other dynos and apps. With 8 CPU cores,
high I/O, and 6GB of RAM, they have the compute resources to
handle the highest loads effortlessly and are ideal for high in-dyno
concurrency architectures.

Visibility and Control

In order to maximize application performance, you need to be able to
monitor and fine-tune it. Runtime Metrics
provides access to CPU and memory usage for each dyno on your
application. Plus, with New Relic
or Librato, you can
view app latency over time.

Premium Support

When apps achieve high-scale, they are being used around the clock.
Heroku is here to support them 24×7. Premium support
provides a 1-hour SLA for urgent tickets, and is available anytime. If
you need even more hands-on assistance, Customer Solutions Architects
are available to help you maximize your use of Heroku with architecture
reviews and application tuning.

Heroku Postgres

Heroku Postgres is a perfect
complement to XL apps. Ika plans
and above have the same performance isolation as high performance
dynos. Choose the Premium tier to get high availability.